Roasting-furnace.



PATENTED JULY 10, 1906.

F. KLEPETKO. ROASTING FURNACE.

APPLICATION FILED NOV. 6, 1905.

0., WASHINGTON. n c.

FRANK KLEPETKO, OF NEl/V YORK, N. Y.

ROASTING-FURNACE.

Specification of Letters Patent.

Patented July 10, 1906..

Application filed November 6,1905. Serial No. 286,047.

To all whmn it may concern:

Be it known that I, FRANK KLEPETKO, a citizen of the United States,residing at New York, in the county of New York and State of New York,have invented certain new and useful Improvements in Roasting-Furnaces,of which the following is a full, clear, and exact description,reference being had to the accompanying drawings, forming a part hereof.

My invention has relation to improvements in roasting-furnaces; and itconsists in the novel construction and arrangement of parts more fullyset forth in the specification, and pointed out in the claims.

In the drawings, Figure 1 is a middle vertical section of a conventionalMcDougall ore-roasting furnace, (partly broken,) showing one form of myinvention applied thereto. Fig. 2 is a crosssection on line 2 2 ofFig. 1. Fig. 3 is a diagrammatic view showing a modified form ofcirculation through the shaft and rabble-arms, and Fig. 4 is adiagrammatic modification showing the feed-pipe entering the bottom ofthe shaft and terminating in the lower compartment thereof.

The present invention relates to improvements in cooling systems for therabble-shaft and rabblearms of ore-roasting furnaces of the turret orMcDougall type, (although the same is applicable to a furnace of anytype whatsoever,) and has for its special object the utilization ofsteam, the superhcating of which in its passage through the shaft andarms results in the abstraction of a suflicient number of heat unitsfrom walls of the rabble apparatus, so as to reduce their temperaturedown to a point where undue disintegration and destruction of the samefrom.

contact with the furnace charge is no longer possible. The system ofcirculation of the cooling medium is such as to insure intimate contactof the steam at all points with the rabble-shaft and arms, so that asufiicient reduction .in the temperature of these parts results, and thelife of the apparatus is materially prolonged.

In detail the invention may be described as follows:

Referring to the drawings, F represents the furnace, and h the severalhearths in which the material is treated, the said material droppingfrom the upper hearth successively through the several hearths untilwvithin the shaft, extending to a point near the bottom of the shaft anddischarging thereinto, the feeder being supplied with water from a pipe6, entering the stuffingbox 7 and leading to any source of supply. (Notshown.) The shaft is divided into a series of independent compartmentsby means of the transversely-disposed partition-walls 8, eachpartition-wall being substantially continuous with the upper walls ofeach adjacent pair (or cluster) of arms, so that each compartmentcommunicates with the cluster or series of arms extending into thehearth opposite thereto. The several compartments of the shaft arebrought into communication with one another by means of the open-endedbranches or conduits 9, leading from a nipple 10, secured to eachpartition 8, the chamber or space above the top partition having leadingtherefrom the outlet or exhaust nozzle 11, which may either dischargeinto a trough 12 or into any suitable chamber from which the exhaust canbe conducted to any desirable point of consumption.

quantity of water is injected through the pipe 6 into the bottomcompartment, and by evaporation the steam fills the bottom compartment,escaping through the arms 4, branches 9, and nipple 10 into the nextcompartment, and so on until it reaches the upper compartment, whence itescapes through the branches 9 and exhaust-pipe 11 into the trough 12,the steam becoming superheated in its passage through the furnace.circulation through the shaft and arms the steam as it is delivered toany compartment through the partition 8 flows outwardly to the outerends of the arms, whence it is drawn inwardly toward the axis of theshaft I10 In the operation of the furnace a limited In its through theconverging .series of branches 9, leading to the next compartment, andso on to the ast compartment.

For purposes of the present invention the feeder need not necessarilydischarge into the bottom compartment, but may discharge into anycompartment, and in Fig. 3 I have shown adiagrammatic view in g whichthe feed-pipe p enters through the bottom of the shaft, passing throughthe shaft and discharging into the upper end thereof orinto the uppercompartment. The circulation in that case would be the reverse from thatshown in Fig. 1, the exhaust escaping through the exhaust-pipe 1 1 intoa trough 12.

In Fig. 4 I show a feeder p discharging into the bottom compartment, thesaid feeder entering through the bottom of the shaft, in which event thecirculation is the same as in Fig. 1; but the construction differstherefrom in that the feeder does not pass through the severalpartitions 8.

Obviously the system can be applied to any kind of furnace or hearth andmay be used in any art.

. Having described my invention, claim is- 1. In a rabble apparatus, ahollow shaftdivided into a series of compartments, hollow arms leadingfrom said compartments, means for introducing a circulating medium intoa compartment and into the arms leading therefrom, and conduits withinthe arms for conveying the medium from the arms to the next succeedingcompartment of the shaft, substantially as set forth.

2. In a rabble apparatus, a hollow shaft divided into a series ofcompartments, hollow arms leading therefrom, means for introducing acirculating medium into a compartment and into the arms leadingtherefrom, and conduitsconfined within the arms and establishingcommunication with a contiguous compartment through the partition-wallseparating the compartments, whereby the cooling medium in the armsleading from any compartment is conveyed to the next comwhat I the axisof the shaft for conveying the medium out of the arms into the shaft ata point contiguous to such axis, substantially asset forth.

4. In a furnace having a plurality of hearths, a hollow shaft passingthrough the hearths, hollow arms radiating from said shaft and extendinginto the several hearths, a series of transverse partitions formed inthe shaft in substantial continuation of the upper walls of the armsdividing the shaft into a series of contiguous compartments, means forintroducing a circulating medium into one of the terminal compartmentsof the series, a series of open-ended conduits in each series of armsestablishing communication/ through a partition with the section ofshaft forming the next succeeding compartment, and an exhaust leadingfrom the opposite terminal compartment, substantially as set forth.

5. In a rabble apparatus, a hollow shaft divided into a series ofcompartments by transverse partitions, hollow arms leading from therespective compartments, means for introducing a circulating medium intoa compartment, and, means confined within the arms and the compartmentfor conducting said circulating medium out of the compartment and itsarms into the next adjacent compartment, substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

FRANK KLEPET-KO.

I/Vitnesses:

EMIL STAREK, J. E. DEAKIN.

